Water-circulating device.



No. 791,230. ,PATENTED MAY 30, 1905. 0. TUBELMANN. WATER OIRCULATING DEVICE.

APPLICATION FILED JULY 26, 1904.

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{UNiT 'n STiriu zs Patented May 30, 1905:

a oARL' OBELMANN, or BERLIN, GEn A N f VllATER-QlHCULATING"DEVlCa SPECIFIGATIONforming part of Letters Patent No. i Application filed July 26,1904. Serial No. 218 208 To all whom it mrty concern:

Be it known that I, CARL 'li'mnnMANN, a citizen oi the Empire of Germany, residing at Berill], in the Kingdom of Prussia, Germany, have 5 invented a new and Improved Water-Circulars,-

ing Device, of whichthe following is a specification.

It is well known to draw in or inject Water by means of stcam-injectors and to convey it 0 further by pressure if one or more steam-in- I 5 the said'pip 20 surfacesof the boiler,

jectors be arranged in'an installation or appavratussuch as, for instance, a steam-boiler in conducting -pipes-=-in such manner as to force all the Water of the boiler to pass through then by using steam of a higher pressure than that hitherto used in boilers it will be possible to produce a very thorp'ugh circulation, and consequently to obtain a much greater transmission of heat at theheatingand thus a better utilization of the fuel.

This invention relates to the working of such injectors in steam-generators and also in installations for heating by hot Water by means 5. of steam at higher pressure than that of the I boiler or generator, but without introduction of any other foreign steam, a secondary steamgenerator being used which is in direct communication with the water-space of the main go boiler or with an apparatus arranged in the main boiler and. taking up the water of condensation. By means of this secondary steamgenerator the effective heating-surface is increased and-the fuel utilized in abetter manner.

The arrangement according to this invention can be applied to boilers or heating-installation of any kind in which a current of Water: can be caused to fiowtl rrough es, either owing to the construction itself of o main apparatus or by the addition of suitable working the injectors.

pipes. The only condition is that the heatingsurface of the secondary generating :apparatus,'which must be made very large compared to its Water-space, must be exposed asmuch L5 as possible to the action of hot gases and that the steam-space of the secondary generator must be arranged so far-below the level of water in the main boiler as is necessary in order to obtain suihclent 791,230, aaisa'iuay 30,1905

nying drawings, in which-*- tube boiler provided with apparatus accord:

horizontal tubes and provided according to the present invention.

hot-water system to which an apparatus" at":- cording to the present invention is applied.

in Fig. '1.) 1 2 3 4 represent aboiler'with' an upper boiler 1, chambers2 1 through again to 1. W aterpassingthrough 2 on again entering the upper boiler is eaughtupby a pipe 6,.' provided with an" injector 5. Inthe zone where the flames are'yery strong under but so'as t6 get as large a heating-surface as hers? and 9 and the narrow series of tubes 8.

. the main boile Water flows into the auxiliary boiler tl'irough the pipe 24. The water, on leaving the 'pipe 24xenters the chamber 22 and flows-into the tubes The steam gen: erated in the tubes 23 flows th ber 21 and the tube 18 to, the injector, 20.

The chamber 7 of Fig. 1 or chamber 22 of pressure of steam for pipe 10 or24 not exposed to the'ac ti'on of ing tomthe present invention. Fig.2 isas'e tional'elevation of a watertube boiler haVing and 3, anjdtube s 9s- The construction of the boilervin this caseis such that circulation of water takes place from 4 3 to 4, from eito 2, and thence back ough the chain The invention is illustrated in the accompa- Figure 1' is asectional elevation of a wa witli'apparatnsf i represents 1n part sectional side elevationga The apparatus will be first described as applied toanordinarywater-tubeboiler. (Shown,

the tubes 4 is arranged: asccondarystearn generator 7 8 9 of any desired construction,

possible anda small water-space with cham- The oblique position of the water-tubes fa.

Fig. 2 could be directly connectedto theww 1 ter-space of the main boiler, by meansoi a ieo 3 5 for the purpose fire. In order to avoid formation of scale in the auxiliary steamgenerator, the removal of which would be attended with great diiiiculties on account of the narrow arrangement 5 of its separate parts, it is advisable to feed the said secondary steam-generator with perfectly pure water and only use the water from the main boiler in the case of absolute necessity. In order, during the working of the x main boiler, to obtain perfectly pure water go perforated for the purpose of providing a convenient discharge for water that may get condensed therein. Under this perforated sievelike part of this discharge-pipe is arranged a cup-shaped vessel 25, n2? rowing downward 2 5 and intended to take up .vater of condensation discharged from the pipe 32. This wa ter of condensation is then conveyed into the secondary steam generator by means of a branch pipe 26 and of a iced-pipe l0 connected o thereto.

As it may happen that in startingthe main boiler after a certain period of rest there will be no water of condensation in the cup or pan 25, there is provided a small auxiliary inlet o'f efieeting the first feed of the secondary generator mechanically with water from the main boiler, if it should be necessary. This auxiliary inlet can be constituted, say, by a float-lever 28 30, pivoted about the point 31 and operating by means of a rod 29 a small valve 27, which when there is no water in the cup or pan is depressed by the sinking of the float 28, whereupon water from the main boiler will be admitted to the branch 26 or pipe 10 and into the secondary steam-generator, the valve closing again as soon asthe level of water is the same in both boilers. When the main boiler is working at a full pressure andsuflicient water of condensation is produced, the valve remains permanently closed, and the feeding of the secondary steam-generator 1s eil'ected merely by the perfectly pure condensed water. The

chamber 9 is provided with a steam-outlet '55- pipe 11, passing through the chamber 2 and provided at. 12 with a check-valve and also with a regulating device 13 and with a watergage 14.

The working of the whole apparatus is as 5o follows: l/Vhen the lire is lighted in the main boiler, the steam-inlet valve lbot' the injector is closed and steam quickly produced in it. As soon as steam has produced a medium levelwater in the secondary steam-generator the 5 inlet-valve 13 is slowly opened. The stoaiu,

the pressure of which is greater than that of the steam in the main boiler, passes into the injector 5 and forces water through the pipe 6 at first a little and then stronger and stronger, this steam thus drawing water from 2 through t and 3. As the water in the boiler gets hotter and hotter the inlet-valve 13 is opened more and more until finally, when the boiler is working at full pressure, the circulation reaches its permanent niiaximum speed. Owing to the direct connection of the waterspaces of the two boilers, there is no risk of explosion. The steam generated must, as will be readily understood, assist the generation of heat in the main boiler as its heat is communicated to the water of the said main boiler.

In boilers constructed so that the water is not circulated naturally circulation could be produced by a guide-plate a?) in the interior of the boiler and by arranging guide-pipes with injectors.

Instead of using a secondary stezun-generator it is possible to utilize the lower portions of the main boiler by separating the steam and conveying it upward to the injectors, the same result thus being attained. Thus, for instance, in water-tube boilers certain of the lower tubes can be utilized by closing the upper ends and conveying the steam for the above purpose, only in that case the injectors would be operated more slowly than when a special generator adapted for quickly producing steam is used.

As will be seen from Fig. 3 of the drawings, the process and the apparatus can be advantageously applied to heating installations of any kind by liquids, whether it be for hygienic, industrial, domestic, or other purposes.

ln the case of embodiment shown in Fig. 3, 33 is the boiler supplying the system consisting of the vertical pipe 34, having the widened portion 35, the cistern 36, the connectingpipes 43, and the heaters 37. In the stove 38 the secondary steam-generator 39 is arranged, said generator being connected with the boiler 33 by means of the pipe id. The steam from the generator passes through the pipe 41, partially situated in the vertical pipe 2-H, to the injector t2,arrangcd in the widened portion 35 of said pipe.

The injector could be equally well arranged in the discharge-pipe 44, as this would also insure perfect circulation of the water in the installation. It is obvious that this device could also be connected with a condensed water feed apparatus, such as that shown in Fig. l.

It is to be understood that the scope of the present invention is not restricted to the applications and embodiments shown in the drawings and described, but that the scope is as indicated by the following claims.

Having now particularly described and ascertained the nature of my said invention and culating water system,

boiler, an auxiliary boiler heated by said heatauxiliary boiler, and means I the steam from said auxiliary boiler into the ing means, means for collecting condensed water in the main boiler, means, for supplying said condensed water as feed-water to the for introducing circulating system.

3Q The combination of a boiler having a'circulating water system, means for heating said boiler,.an auxiliary boiler heated by said heating. means, means .for collecting condense water in the main boiler, means for supplying said condensed water as feed-water to the auxiliary boiler, means outletpipe said pipe 32 and for automatically admitting water fromthe main boiler "as feedwater. to the auxiliary boiler in case of the supply of condensed water being, 'insufii'cient, and means for introducing the steam from said auxiliary boiler into the circulating systern of the main boiler;

4. The combination of a water-tube boiler having an upper boiler'l, a chamber 3, tubes boiler, an auxiliary boiler heated by said heating means and having apipe 10,-a chamber 7, tubes 8, achamber 9, and a pipe 11, an injector 5 at the end of said pipe 11, the steam- 32 provided with perforations, the condensation vessel 25 arranged under connected with the pipe 10, the float 28, the float-lever 30, the valve 29 in said vessel 25, and the rod '29 operating said valve from said float.

In witness whereof I have hereunto signed my name, this lath day of CARL TOBELMANN. Witnesses:

HENRY Hasrnn,

- WILLIAM MAYNER.

35 4:, and a chamber 2, means for heating said July, 1904:,in the presence of two subscribing witnesses. 

